im guessin you're running nmap on windows? because of the C:\test.txt
and if i understood right, you want an output with the pings that are alive in that range
i recommend using linux here, bash scripting can help a lot on the output file
example:
that gives you an output on the 148-range.txt file of all the ip's in the range, again, this is just an example, you might want to give a read or two to a bash scripting manual or tutorialCode:cat test.txt | grep open | cut -d" " -f2 > 148-range.txt
might wanna start here



